Perform the indicated operation.
? 
A. - 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve the problem.The decay of 356 mg of an isotope is given by A(t) = 356e-0.019t, where t is time in years. Find the amount left after 89 years.
A. 33 mg B. 66 mg C. 349 mg D. 64 mg
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Find the rate. Round to the nearest tenth of a percent.Principal: $8,000Time: 90 daysInterest: $140.00
A. 34.6% B. 7.0% C. 7.1% D. 1.8%
Mathematics
Solve the problem. Round to the nearest tenth if necessary.The price of a printer was reduced from $400 to $180. What was the percent of decrease?
A. 55% B. 45% C. 122.2% D. 60%
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The graph of a function f is given. Use the graph to answer the question.For what values of x is f(x) = 0?
A. -20, -12, 14, 20 B. -12, 14 C. -12 D. -12, 14, 20
Mathematics